GCN Circular 9559
Subject
GRB 090621B: Gemini spectrum of afterglow candidate
Date
2009-06-22T19:42:32Z (15 years ago)
From
Edo Berger at Harvard <eberger@cfa.harvard.edu>
E. Berger (Harvard), A. Cucchiara, D.B. Fox (Penn State), and A.J. Levan
(U. Warwick) report:
"On 2009 June 22.41 UT we used the GMOS instrument mounted on the
Gemini-North 8-m telescope to obtain spectroscopic observations of the
candidate optical afterglow (GCN #9547) of the short GRB 090621B (GCN
#9545). A pair of 1800 sec exposures were obtained with a wavelength
coverage of 4500-7500A. The combined spectrum of the source reveals
broad features typical of an early M dwarf star. We therefore conclude
that this object is unrelated to the GRB."